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https://issues.apache.org/jira/browse/OAK-3878?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Reschke updated OAK-3878:
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Description:
{{BlobReferenceIterator}} in DocumentMK makes use of {{DocumentStore}} API to
query the NodeDocument. This would cause all those NodeDocuments to be added to
cache in DocumentStore. Due to this when blob gc is running cache usage would
not be that effective due to all the associated churn.
As these NodeDocument are only required for BlobGC logic and its not expected
that this document would read again soon it would be better to skip caching of
these documents within DocumentStore
Similar requirement exist in VersionGC logic but there we use direct store
based API which does not add such documents to the cache
was:
{{BlobReferenceIterator}} in DocumentMK makes use if {{DocumentStore}} API to
query the NodeDocument. This would cause all those NodeDocuments to be added to
cache in DocumentStore. Due to this when blob gc is running cache usage would
not be that effective due to all the associated churn.
As these NodeDocument are only required for BlobGC logic and its not expected
that this document would read again soon it would be better to skip caching of
these documents within DocumentStore
Similar requirement exist in VersionGC logic but there we use direct store
based API which does not add such documents to the cache
> Avoid caching of NodeDocument while iterating in BlobReferenceIterator
> ----------------------------------------------------------------------
>
> Key: OAK-3878
> URL: https://issues.apache.org/jira/browse/OAK-3878
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: documentmk
> Reporter: Chetan Mehrotra
> Priority: Minor
> Fix For: 1.4
>
>
> {{BlobReferenceIterator}} in DocumentMK makes use of {{DocumentStore}} API to
> query the NodeDocument. This would cause all those NodeDocuments to be added
> to cache in DocumentStore. Due to this when blob gc is running cache usage
> would not be that effective due to all the associated churn.
> As these NodeDocument are only required for BlobGC logic and its not expected
> that this document would read again soon it would be better to skip caching
> of these documents within DocumentStore
> Similar requirement exist in VersionGC logic but there we use direct store
> based API which does not add such documents to the cache
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